| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power conversion device which can be restarted as it is even if there arises short-time power interruption which is allowable to a power converter and control devices. <P>SOLUTION: The power conversion device is constituted of the power converter 5 and the control devices 1A, 1B. Each control device comprises a means which stores each status of "selection", "standby" and "maintenance", and reads in the status of a counter party, a means which performs a "control switching request" to the counter party, and a means which performs a "request answer" to the control device of the counter party. When one of the control devices detects an abnormality during the operation of the power converter, the control device stops the operation control of the power converter and requests control switching to the other, and the other control device performs the "request answer", and starts the operation control of the power converter. Each of the control devices has a power interruption/recover detection means of a main power supply of the power converter 5, restarts when the control device in operation detects the power interruption and recovers power within a prescribed time, and requests a "control switching request" when the power is not recovered. <P>COPYRIGHT: (C)2011,JPO&INPIT |
